OT Naming Convention

FE Channels


As discussed in the Introduction , the OT is geographically subdivided in: (This scheme is illustrated in detail in the LHCb note LHCb-2003-041.)

Here an overview of the channel numbering scheme is given. This is determined by the channel sequence in the OTIS , folded with the numbering scheme of the four OTIS Boards on the FE Box.


FE-Box-with-OTIS

Since all 408 FE Boxes (128 channels) on the OT detector have identical construction, their geometrical positions influence the channel numbering:
The description of the channel numbering scheme can be found in:
The conversion between the channel address as specified in LHCb-2003-041 and the straw numbering scheme used by the OT reconstruction can be performed on the basis of the channel address [quarter, layer, otis, otis_channel] that is carried by the data itself (see EDMS 833984).
Two possible implementations are given below: